<style>
    td {
        text-align: center;
    }
</style>
<table style="margin: 10px; padding: 10px;">
    <tr>
        <td style="text-align: right; border-right:1px red solid">&rarr;</td>
        <td colspan="4"
            style="text-align: left; border-left:1px red solid">&larr; <em><font
                color="red">M</font></em></td>
    </tr>
    <tr>
        <td style="border:1px solid"><code>Q u i</code></td>
        <td style="border:1px solid"><code>c k</code></td>
        <td width="10px"></td>
        <td style="border:1px solid"><code>b r o w n</code></td>
    </tr>
    <tr>
        <td colspan="2" style="text-align: right; border-right:1px green solid">
            &rarr;
        </td>
        <td></td>
        <td colspan="2"
            style="text-align: left; border-left:1px green solid">&larr;
            <em><font color="green">W</font></em></td>
    </tr>
</table>